<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    .gege{
      width: 100px;
      min-height: 600px;
      border: 1px solid skyblue;
      float: left;
      margin-right: 20px;
    }
    .didi {
      min-height: 600px;
      border: 2px solid orange;
      /* width: ; */
      overflow: hidden;
      /* margin-left: 90px; */
    }
  </style>
</head>
<body>
  <div class="gege">12</div>
  <div class="didi">12</div>
</body>
</html>